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GEOGRAFSKI INFORMACIJSKI SISTEMI V SLOVENIJI 2005–2006

GEOGRAFSKI INFORMACIJSKI SISTEMI V SLOVENIJI 2005–2006

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GIS v Sloveniji <strong>2005–2006</strong>, 13–21, Ljubljana 2006ASIMILACIJA PODATKOV KOT METODA V GISKlemen Zak{ekIn{titut za antropolo{ke in prostorske {tudije ZRC SAZUNovi trg 2, 1000 Ljubljanaklemen.zaksek@zrc-sazu.siUDK: 659.2:004:91IZVLE^EKAsimilacija podatkov kot metoda v GISPri modeliranju dinami~nih procesov imamo pogosto na voljo premalo podatkov, da bi zanesljivo dolo~ilivrednost izbrane spremenljivke na poljubni to~ki v izbranem ~asu. Ker so pri dinami~nih procesih podatkizajeti v razli~nih trenutkih, so rezultati, pridobljeni s klasi~nimi interpolacijskimi metodami, nezanesljivi.Asimilacija podatkov pa omogo~a izdelavo zveznega sloja izbrane spremenljivke za izbran trenutek napodlagi matemati~nega modela tudi, ~e so bili podatki zajeti v razli~nih trenutkih. Gre za prostorsko ~asovnoanalizo, ki poi{~e tisti model, ki se optimalno ujema z danimi podatki. V okviru tega ~lanka je prikazanazmogljivost te metode za modeliranje dinami~nih procesov v GIS na primeru uporabe asimilacije podatkovna razli~nih podro~jih.KLJU^NE BESEDEasimilacija podatkov, model, dinami~ni procesi, prostorsko ~asovne analizeABSTRACTData assimilation as GIS methodThe dynamical process modelling is often affected by the lack of appropriate data, thus the value of the selectedvariable in the chosen location and time is uncertain. Data acquisition moment is usually not the samefor the whole available dataset in the case of the dynamical processes, thus results generated with the classicalinterpolation methods are unreliable. The data assimilation enables the generation of the continuouslayer of the chosen variable in the chosen time by a mathematical model, even if the input data were acquiredin different moments. It is the spatial-temporal analysis that searches for the model that optimally fits theavailable data. Within the article, the method ability of an effective modelling of dynamical processes inGIS is shown with some examples from different applications.KEYWORDSdata assimilation, model, dynamical processes, spatial-temporal analyses13

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